# Octave Analysis

## Description

The signal processing block `Octave Analysis`

octave averages individual 1/B octave bands of an input.
The octave analyser is designed based on IEC 61260-1:2014 and the
specifications in the attributes. The octave filters are class 1 which is the best filter class

##### tip

If you want to use octave filters go here.

#### Input

The input is `MxN`

.

#### Output

The output is `KxN`

which is the average of each `K`

`1/B`

octave band of the input signal `MxN`

.
The size `K`

is dependent on how many bands pr octave and the start and end frequency.

## Attributes

Attribute | Value |
---|---|

Name | OctaveAnalysis |

Bands pr. octave | 3 |

Start frequency | 20 Hz |

Stop frequency | 20.000 Hz |

Base | 10 |

Reference frequency | 1000 Hz |

Channels | 1 |

#### Name

Name specifies the name of the block.

#### Bands pr. octave

Bands pr. octave is the number of bands pr. octave. Maximum is 24 bands pr. octave.

#### Start frequency

Start frequency is the frequency which the lowest octave band must contain.

#### Stop frequency

Stop frequency is the frequency which the highest octave band must contain.

#### Base

Base is a design parameter which can either be `10`

or `2`

. For default standard octave filters it is `10`

.

#### Reference frequency

Reference frequency is a design parameters. For default standard octave filters it is `1000 Hz`

## Examples

This example shows a 1/3 octave analysis of a summed white noise and a 1000 Hz tone.